WO2010002014A1 - REFRIGERANT COMPOSITION COMPRISING DIFLUOROMETHANE (HFC32), PENTAFLUOROETHANE (HFC125) AND 2,3,3,3-TETRAFLUOROPROPENE (HFO1234yf) - Google Patents

REFRIGERANT COMPOSITION COMPRISING DIFLUOROMETHANE (HFC32), PENTAFLUOROETHANE (HFC125) AND 2,3,3,3-TETRAFLUOROPROPENE (HFO1234yf) Download PDF

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Publication number
WO2010002014A1
WO2010002014A1 PCT/JP2009/062243 JP2009062243W WO2010002014A1 WO 2010002014 A1 WO2010002014 A1 WO 2010002014A1 JP 2009062243 W JP2009062243 W JP 2009062243W WO 2010002014 A1 WO2010002014 A1 WO 2010002014A1
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WO
WIPO (PCT)
Prior art keywords
mass
hfc32
hfo1234yf
hfc125
refrigerant composition
Prior art date
Application number
PCT/JP2009/062243
Other languages
English (en)
French (fr)
Inventor
Tatsumi Tsuchiya
Katsuki Fujiwara
Masahiro Noguchi
Yasufu Yamada
Original Assignee
Daikin Industries, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daikin Industries, Ltd. filed Critical Daikin Industries, Ltd.
Priority to CN200980125795.6A priority Critical patent/CN102083934B/zh
Priority to ES09773592T priority patent/ES2383582T3/es
Priority to JP2011514282A priority patent/JP5556813B2/ja
Priority to AT09773592T priority patent/ATE552319T1/de
Priority to US13/001,847 priority patent/US8496845B2/en
Priority to EP09773592A priority patent/EP2328992B1/de
Publication of WO2010002014A1 publication Critical patent/WO2010002014A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/02—Materials undergoing a change of physical state when used
    • C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
    • C09K5/041—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems
    • C09K5/044—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds
    • C09K5/045—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds containing only fluorine as halogen
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
    • C09K2205/10—Components
    • C09K2205/12—Hydrocarbons
    • C09K2205/126—Unsaturated fluorinated hydrocarbons
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
    • C09K2205/22—All components of a mixture being fluoro compounds

Definitions

  • the present invention relates to a mixed refrigerant composition
  • a mixed refrigerant composition comprising difluoromethane (HFC32) , pentafluoroethane (HFC125), and 2, 3, 3, 3-tetrafluoropropene (HFO1234yf) , for use in refrigeration and air-conditioning systems.
  • HFC32 difluoromethane
  • HFC125 pentafluoroethane
  • HFO1234yf 2, 3, 3, 3-tetrafluoropropene
  • propenes having a double bond in the molecule have been proposed.
  • Such propenes have a lower global warming potential (GWP) compared with known chlorofluorocarbon (CFC) , hydrochlorofluorocarbon (HCFC) , and hydrofluorocarbon (HFC) .
  • CFC chlorofluorocarbon
  • HCFC hydrochlorofluorocarbon
  • HFC hydrofluorocarbon
  • HFO1234yf 2,3,3,3-Tetrafluoropropene
  • This refrigerant is flammable, and ignites at a concentration of 6.5 to 12.5 vol.% in air at 21°C.
  • this refrigerant has a higher boiling point than HCFC22, which has been conventionally used in stationary air conditioners, and R407C and R410A, which have come into use as alternatives to HCFC22 and are uninvolved in the depletion of the ozone layer. For this reason, the refrigerating capacity cannot be maintained by the use of HFO1234yf alone.
  • a low global warming potential (GWP) of the refrigerant itself is obviously important; however, the energy use efficiency of the device using the refrigerant is equally, or more important.
  • the former is evaluated as a direct environmental impact, and the latter as an indirect environmental impact.
  • LCCP Life Cycle Climate Performance
  • LCCP has been proposed as an objective index for these evaluations (Non-Patent Literature 1 etc.).
  • NPL 1 "LIFE CYCLE CLIMATE PERFORMANCE OF SOME APPLICATIONS IN
  • the vapor compression refrigeration cycle When a refrigerant having a high boiling point is used at a low operating pressure, the vapor compression refrigeration cycle has an insufficient capacity. Therefore, it is necessary to increase the size of the device etc. to ensure the desired cooling or heating capacity, which normally results in a deteriorated indirect impact due to pressure loss. Moreover, when the refrigerant is flammable, the use of a highly safe material in the electrical system is required, and an upper limit is set on the amount of the refrigerant to be charged into an apparatus.
  • An object of the present invention is to provide a refrigerant composition that is nonflammable, and ensures low LCCP and less burden on the environment.
  • a refrigerant composition comprising difluoromethane (HFC32), pentafluoroethane (HFC125) , and 2, 3, 3, 3-tetrafluoropropene (HFO1234yf) , the ratio of HFC32/HFC125/HFO1234yf being in a range surrounded by points (0/21/79 mass%) , (16.6/25.3/58.1 mass%) , and (0/28.4/71.6 mass%) in a ternary diagram of a composition comprising HFC32, HFC125, and HFO1234yf (Fig. 1), and the composition essentially containing HFC32.
  • HFC32 difluoromethane
  • HFC125 pentafluoroethane
  • HFO1234yf 2, 3, 3, 3-tetrafluoropropene
  • a refrigerant composition comprising the above components at a ratio in a range surrounded by points (3/22/75 mass%) , (15/25/60 mass%) , and (3/27/70 mass%) ; and particularly preferred is a composition comprising the above component at a ratio in a range surrounded by points (5/24/71 mass%) , (3/24/73 mass%) , (3/22/75 mass%) , and (5/22/73 mass%) in the above ternary diagram (Fig. 1) .
  • the point expressed by (3/22/75 mass%) in the ternary diagram for example, means a composition that comprises 3 mass% of HFC32, 22 mass% of HFC125, and 75 mass% of HFO1234yf.
  • the ranges surrounded by the above-described points in the ternary diagram include all possible proportions of the three components in the composition located on each side and inside the triangle or tetragon defined by the above three or four points.
  • the present invention was accomplished upon further studies based on these findings.
  • the present invention provides the following nonflammable refrigerant composition.
  • a refrigerant composition comprising difluoromethane (HFC32) , pentafluoroethane (HFC125), and 2,3,3,3- tetrafluoropropene (HFO1234yf) , -A- the ratio of HFC32/HFC125/HFO1234yf being in a range surrounded by points (0/21/79 mass%) , (16.6/25.3/58.1 mass%) , and (0/28.4/71.6 mass%) in a ternary diagram of a refrigerant composition containing HFC32, HFC125, and HFO1234yf, and the composition essentially comprising HFC32.
  • HFC32 difluoromethane
  • HFC125 pentafluoroethane
  • HFO1234yf 2,3,3,3- tetrafluoropropene
  • Item 2 The refrigerant composition according to Item 1, wherein the ratio of HFC32/HFC125/HFO1234yf is in a range surrounded by points (3/22//75 mass%) , (15/25/60 mass%) , and (3/27/70 mass%) in the ternary diagram.
  • Item 3 The refrigerant composition according to Item 1 or 2, wherein the ratio of HFC32/HFC125/HFO1234yf is in a range surrounded by points (5/24/71 mass%) , (3/24/73 mass%) , (3/22/75 mass%) , and (5/22/73 mass%) in the ternary diagram.
  • Item 4 The refrigerant composition according to any one of Items 1 to 3, further comprising a polymerization inhibitor.
  • Item 5 The refrigerant composition according to any one of Items 1 to 4, further comprising a drying agent.
  • Item 6 The refrigerant composition according to any one of Items 1 to 5, further comprising a stabilizer.
  • Item 7 A method of operating a refrigerator, comprising circulating the refrigerant composition according to any one of Items 1 to 6 via a compressor.
  • Item 8 A method of producing the refrigerant composition according to Item 2, comprising mixing difluoromethane (HFC32), pentafluoroethane (HFC125), and 2, 3,3,3- tetrafluoropropene (HFO1234yf) so that the ratio of HFC32/HFC125/HFO1234yf is in a range surrounded by points (3/22/75 mass%), (15/25/60 mass%) , and (3/27/70 mass%) in a ternary diagram of a refrigerant composition containing HFC32, HFC125, and HFO1234yf.
  • HFC32 difluoromethane
  • HFC125 pentafluoroethane
  • HFO1234yf 3,3,3- tetrafluoropropene
  • Item 9 A refrigerator comprising the refrigerant composition according to any one of Items 1 to 6.
  • the refrigerant composition of the present invention provides the following effects:
  • the refrigerant composition of the invention achieves the same or improved cycle performance compared to conventionally available refrigerants such as R407C or R410A when used as a refrigerant for a heat pump apparatus.
  • Nonflammability of the refrigerant does not require any special changes in the specification of the device, including the use of safe and secure members .
  • the global warming potential (GWP) is less than those of conventionally-used refrigerants such as R407C and R410A.
  • the refrigerant composition is excellent in LCCP evaluation, and its contribution to global warming is as low as, or lower than, that of conventionally available refrigerants such as R407C or R410A, when used as a refrigerant for a heat pump apparatus .
  • Fig. 1 is a ternary diagram showing the proportions of HFC32, HFC125, and HFO1234yf in a refrigerant composition.
  • Fig. 2 shows the flammable range of a mixed system of HFC32, HFC125, and HFO1234yf.
  • Fig. 3 schematically illustrates an apparatus used in the flammability test.
  • the present inventors conducted extensive research on the relationships of the mixing ratio of HFC32, HFC125, and HFO1234yf to LCCP (Life Cycle Climate Performance) and to flammability.
  • LCCP and flammability are evaluated by the methods described in Test Examples 1 and 2, respectively.
  • the results of the evaluation revealed that when a refrigerant composition comprises HFC32, HFC125, and HFO1234yf at a ratio of HFC32/HFC125/HFO1234yf in a range surrounded by points (0/21/79 mass%), (16.6/25.3/58.1 mass%) , and (0/28.4/71.6 mass%) in a ternary diagram of a refrigerant composition containing HFC32, HFC125, and HFO1234yf (Fig. 1), and when the refrigerant composition essentially comprises HFC32, the composition is nonflammable, and ensures low LCCP and less burden on the environment .
  • the refrigerant composition comprising HFC32, HFC125, and HFO1234yf is nonflammable, and ensures low LCCP and less burden on the environment, when each component ratio (a/b/c mass%) satisfies the following relations: 0 ⁇ a ⁇ 16.6 (1)
  • the refrigerant composition exhibits more excellent effects when the above components are mixed so that the ratio of HFC32/HFC125/HFO1234yf is in a range surrounded by points (3/22/75 mass%) , (15/25/60 mass%) , and (3/27/70 mass%) .
  • the ratio of HFC32/HFC125/HFO1234yf is in a range surrounded by points (5/24/71 mass%), (3/24/73 mass%) , (3/22/75 mass%) , and (5/22/73 mass%) , the composition exhibits even more excellent effects .
  • the refrigerant composition of the present invention is nonflammable, and has a low GWP and excellent refrigerating capacity.
  • the refrigerant composition of the present invention has high stability. If necessary, stabilizers may be added to meet the requirement of high stability under severe conditions .
  • Examples of usable stabilizers include (i) aliphatic nitro compounds such as nitromethane and nitroethane; aromatic nitro compounds such as nitrobenzene and nitrostyrene; (ii) ethers such as 1, 4-dioxane; amines such as 2,2,3,3,3-pentafluoro propylamine and diphenylamine; butylhydroxyxylene, benzotriazole, etc.
  • the stabilizers can be used singly or in a combination of two or more.
  • the amount of stabilizer used may vary depending on the type of stabilizer used, as long as it does not impair the performance of the nonflammable composition. Generally, the stabilizer is preferably used in an amount of about 0.01 to about 5 parts by weight, and more preferably about 0.05 to about 2 parts by weight, per 100 parts by weight of the mixture of HFC32, HFC125, and HFO1234yf.
  • composition of the present invention may further contain a polymerization inhibitor.
  • a polymerization inhibitor examples thereof include 4- methoxy-1-naphthol, hydroquinone, hydroquinone methyl ether, dimethyl-t-butylphenol, 2, ⁇ -di-tert-butyl-p-cresol, benzotriazole, etc.
  • the polymerization inhibitor is preferably used in an amount of about 0.01 to about 5 parts by weight, and more preferably about 0.05 to about 2 parts by weight, per 100 parts by weight of the mixture of HFC32, HFC125, and HFO1234yf.
  • composition of the present invention may further contain a drying agent.
  • the refrigerant composition of the present invention can be circulated via a compressor to form a refrigeration cycle. Additionally, an apparatus that circulates the refrigerant composition via a compressor to constitute a refrigeration cycle can be provided.
  • refrigerating systems that can use the refrigerant composition of the present invention include, but are not limited to, car air conditioners, refrigerating units for vending machines, industrial and household air-conditioners, gas heat pumps (GHP), and electrical heat pumps (EHP), and the like.
  • the refrigerant composition is effectively used in industrial and household air conditioners, whose downsizing is desired.
  • Test Example 1 The present invention is described below with reference to examples; these examples, however, do not limit the scope of the invention. Test Example 1
  • Example 1 Using a composition comprising HFC32/HFC125/HFO1234yf (Example 1: 4/23/73 mass%, Example 2: 15/25/60 mass%, Example 3: 2/26/72 mass%, and Example 4: 10/25/65 mass%) as a refrigerant, a heat pump apparatus was operated under the following conditions: [cooling rated] capacity: 4kW, evaporating temperature of the refrigerant in the evaporator: 10 0 C, condensing temperature of the refrigerant in the condenser: 45 0 C;
  • the heat pump apparatus was operated using R410A (Comparative Example 1) and R407C (Comparative Example 2) under the same conditions as above.
  • the heat pump was operated using HFC32/HFCl25/HFO1234yf (Comparative Example 3: 23/25/52 mass%, and Comparative Example 4: 15/45/40 mass%) under the same conditions as above.
  • the coefficient of performance (COP) was calculated on the basis of the obtained results.
  • the COP, evaporation pressure, and condensation pressure are shown in Table 1. Subsequently, the results were used for calculating the annual power consumption (kWh) in conformity with JRA 4046:2004, and LCCP evaluation has been performed (Table 2) .
  • COP coefficient of performance
  • LCCP coefficient of performance
  • Direct impact (leakage during charging at a manufacturing plant) + (annual regular leakage) + (annual irregular leakage) + (leakage during servicing) + (leakage during disposal)
  • GWP global warming potential in terms of CO 2 per kg (kg-CO 2 /kg) , integration time horizon (ITH) : 100 years
  • GWP AE additional GWP caused by release during production etc. (including those caused by leakage of by-products etc., and indirect release) (kg-CO 2 /kg)
  • the values of the global warming contribution CO 2 emission ratio (indirect impact, direct impact, and LCCP) of Examples 1 to 4 and Comparative Examples 2 to 4 are relative values (ratios) obtained by expressing the indirect impact, direct impact, and LCCP of Examples 1 to 4 and Comparative Examples 2 to 4, on the basis that the values of Comparative Example 1 (R410A) are considered to be 100.
  • the refrigerant composition of the present invention showed equivalent or lower values compared with R410A and R407C. Accordingly, the refrigerant obviously has the least effect on the environment.
  • the flammability of the mixed refrigerant of the three components used in the refrigerant composition of the present invention was evaluated by measuring the flammable range using a measuring apparatus in accordance with ASTM E681-2001. See Fig. 3,
  • a 12-L spherical glass flask was used so that the combustion state can be visually observed and photographically recorded. During the generation of excessive pressure by combustion, gas was allowed to escape from an upper lid. Ignition was achieved by electrical discharge from electrodes held at one third of the distance from the bottom.
  • Test vessel 280 mm ⁇ spherical (internal volume: 12 liters) Test temperature: 6O 0 C +3 0 C
  • Ignition method AC discharge Electrode interval: 6.4 mm (1/4 inch)
  • Fig. 2 is the result showing the flammable range of the mixed system of HFC32, HFC125, and HFO1234yf.
  • Each component ratio of HFC32, HFC125, and HFO1234yf (a/b/c mass %) in the nonflammability limit almost satisfied the relationship represented by the following formulae (4) to ( ⁇ ) :
  • the refrigerant composition comprising HFC32/HFC125/HFO1234yf of the present invention is nonflammable, causing no combustion even when it is mixed with air in any ratio.
  • the mixed refrigerant composition of the present invention is effectively used in refrigeration and air- conditioning systems.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
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PCT/JP2009/062243 2008-07-01 2009-06-30 REFRIGERANT COMPOSITION COMPRISING DIFLUOROMETHANE (HFC32), PENTAFLUOROETHANE (HFC125) AND 2,3,3,3-TETRAFLUOROPROPENE (HFO1234yf) WO2010002014A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CN200980125795.6A CN102083934B (zh) 2008-07-01 2009-06-30 包含二氟甲烷(HFC32)、五氟乙烷(HFC125)和2,3,3,3-四氟丙烯(HFO1234yf)的制冷剂组合物
ES09773592T ES2383582T3 (es) 2008-07-01 2009-06-30 Composición refrigerante que comprende difluorometano (HFC32), pentafluoroetano (HFC125) y 2,3,3,3-tetrafluoropropeno (HFO1234yf)
JP2011514282A JP5556813B2 (ja) 2008-07-01 2009-06-30 ジフルオロメタン（ＨＦＣ３２）、ペンタフルオロエタン（ＨＦＣ１２５）及び２，３，３，３−テトラフルオロプロペン（ＨＦＯ１２３４ｙｆ）を含む冷媒組成物
AT09773592T ATE552319T1 (de) 2008-07-01 2009-06-30 Kühlmittel mit difluormethan (hfc32), pentafluorethan (hfc125) und 2,3,3,3,- tetrafluorpropen (hfo1234yf)
US13/001,847 US8496845B2 (en) 2008-07-01 2009-06-30 Refrigerant composition comprising difluoromethane (HFC32), pentafluoroethane (HFC125) and 2, 3, 3, 3-tetrafluoropropene (HFO1234yf)
EP09773592A EP2328992B1 (de) 2008-07-01 2009-06-30 Kühlmittel mit difluormethan (hfc32), pentafluorethan (hfc125) und 2,3,3,3,-tetrafluorpropen (hfo1234yf)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US12949908P 2008-07-01 2008-07-01
US61/129,499 2008-07-01
US11290108P 2008-11-10 2008-11-10
US61/112,901 2008-11-10

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WO2010002014A1 true WO2010002014A1 (en) 2010-01-07

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PCT/JP2009/062243 WO2010002014A1 (en) 2008-07-01 2009-06-30 REFRIGERANT COMPOSITION COMPRISING DIFLUOROMETHANE (HFC32), PENTAFLUOROETHANE (HFC125) AND 2,3,3,3-TETRAFLUOROPROPENE (HFO1234yf)

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US (1) US8496845B2 (de)
EP (2) EP2460865B1 (de)
JP (2) JP5556813B2 (de)
CN (1) CN102083934B (de)
AT (1) ATE552319T1 (de)
ES (2) ES2405679T3 (de)
TW (1) TW201009061A (de)
WO (1) WO2010002014A1 (de)

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US8496845B2 (en) 2013-07-30
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EP2328992B1 (de) 2012-04-04
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TW201009061A (en) 2010-03-01
ATE552319T1 (de) 2012-04-15

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